Improvement in dies or mouths for brick-machines



UNITED STATES PATENT FFICE.

CHARLES HENRY MURRAY, OF SOUTHWARK, ENGLAND.

IMPROVEMENT IN DIES OR MOUTHS FOR BRICK-MACHINES.

ySpecification forming part of Letters Paf ent No. 140,297, dated June24, 1873; application filed .Tune 20, 1872.

lo all whom it may concern:

Be it known that I, CHARLES HENRY MURRAY, of Loman street, Southwark, inthe coun-ty of Surrey, England, machinist, have invented certainImprovements in Machinery for Molding Clay f'or making Bricks, Tiles,and other analogous articles from plastic substances, of which thefollowing is a specification:

My invention of improvements in Inachinery for molding` clay for makingbricks, tiles, and other analogous articles from plastic substances hasfor its object to so construct the die through which the clay or otherplastic substance is delivered, and to lubricate the faces thereof, thatthe clay will be delivered with less friction, and consequently with asmoother and more even surface, than heretofore.v

The apparatus which I employ for the purposes of my invention, and themode of applying the same, are shown in the accompanyin g drawing, inwhich- Figure l is a front elevation of the mouth or die of abrick-making machine, showing my improvement adapted thereto. Fig. 2 isa side view thereof', and Fig. 3 is a horizontal section. a a is thefront plate of the machine, and to which my improved die b b is attachedin anyconvenient manner. The sides b1 b1 of the die b are made hollow,or in the form ot' boxes, and are removable. These boxes b1, which areshown detached in front elevation at Fig. 4, and in section at Fig. 5,are supplied with water, oil, or other liquid lubricating material orcompound, which is caused to exude from the hollow vessels or boxes b1b1, through saw-cuts, slits, or holes made in the face of the vessel, asshown at Fig. 4. The perforated faces of the boxes b1 are covered withfelt, woolen,or other porous material, as indicated at Fig. 5. Thisfabric will prevent the water,` oil, or other lubricant, from runningout too quickly, and the water or oil will perfectly saturate thefabric.- These hollow vessels which form the sides of the die, as shownin Fig. 3, are fitted in their places, and are secured by means ofscrews o c, which pass through lugs secured to or fixed onto thestationary part a. By loosening the screws o o the boxes or vessels b1bl may at any time be removed, cleaned, and replaced without derangingany of the other parts of the machine.

In order to cause the lubricating liquid to pass through the felt orporous fabric with which the faces of the boxes or hollow vessels b1 arecovered, the reservoirs d d which supply these vessels with thelubricating fluid are placed at any convenient distance above them. Thefelt or porous covering ofthe boxes, or hollow vessels b1, is compressedby the clamps and tighteningscrewsc, between the fixed and stationaryparts of the die, so as to pack these joints and render them perfectlywatertight.

It will now be understood that the clay in passing out of the machineand in exuding from the die, in the direction of the arrow in Fig. 3,Will rub up against the felt or woolen covering of the boxes or hollowvessels bl, and will carry awa-y with ita very thin film of lubricatingmaterial, and will, therefore, be delivered with a perfect] y smooth andeven surface.

In practice it has not been found necessary to adapt the lubricatingarrangement to either the top or bottom ofthe die., but it will beevident that, it' desired, this may be done in the manner shown, withrelation to the sides.

Having now described my invention of improvements in machinery formolding clay for making bricks, tiles, and other analogous articles fromplastic substances, and having explained the manner of carrying the sameinto e'ect, I claim- A mold or aperture in brickmaking machines, throughwhich the plastic material is delivered, with movable hollow boxesprovided with perforated sides, forming the sides of the mold oraperture, substantially as and for the purpose set forth.

CHARLES HENRY MURRAY.

Witnesses:

H. K. WHITE, A. BIsHor,

66 Chancery Lane, London, England.

